(INC) Nevada wasnt the first state to approve recreational marijuana usage but it is the first to make it illegal to discriminate against users. Thats not the language used in the bill but thats what the law does. Instead of leaving it up to an employer to determine if they want a drug-free workplace you have to treat marijuana users as equals to non-users. New York City has similar legislation that will go into effect shortly after Nevadas even though New York doesnt have legalized recreational marijuana. There is logic to this change because unlike alcohol which clears out of your system relatively rapidly you can test positive for marijuana when you arent remotely high. Blood and saliva tests can show if you are under the influence but not the degree as you can determine with alcohol. Urine tests will only show that there has been usage. The idea is why worry about what someone did Saturday night when they wont be to work until Monday?